He challenged critics of Tuesday's deal to present a better alternative - seen as a veiled reference to his Republican opponents in Congress.
The UN Security Council will vote next week on a resolution endorsing the agreement, Iran says.
In return for an end to sanctions, Iran will limit its nuclear activities.
The president has said there will be a robust debate with Congress.
ReadWow! I guess that when U.S. leftists totally refused to hold their Political Messiah responsible for his lies concerning Obamacare (If you like your current Health Care plan and M.D. then you can keep them) that he experienced this sense of anti-ethical freedom to the degree that he no longer worries about being caught out in any lie whatsoever. 99% of the world does NOT want this particular piece of crap nuclear deal with Iran!Hmmm . . . and so what to discuss about this? There is nothing to discuss in reality. The GOP leadership have repeatedly proved that they have the collective political spine of a worm and so after much blustering and threats they will ultimately sign off on Obama's obscenity of a 'deal' with Iran; an Iran that by the way is laughing at the United States over this deal.
So there is nothing to debate. It's effectively a done deal. I just wonder WHY leftists WANTED to do this sort of thing to the United States of America and to the West in general when they deliberately selected a first term U.S. senator with ZERO meaningful national level experience to become president and then put him into office again after he amply demonstrated that as president he is and shall always be a radical nation-hating Community Organizer. Why in the world were leftists DETERMINED to do THAT to this nation and to the West?